Service Data

SERVICE DATA

Converter Outlet Pressure

To test the converter outlet pressure perform the following steps:

1. Ensure that the engine has had sufficient time to cool and is isolated and tagged as described in Section 1. 2. Remove the cover over the top of the transmission. This panel is located in front of the operator’s compartment. 3. Attach a 0-500 kPa pressure gauge to the port adjacent to the converter outlet temperature pick up. 4. Start the machine and bring the transmission oil temperature to between 82.2 °C and 93.3 °C. This can be read from the transmission temperature gauge in the operator’s compartment. To bring the temperature to this level it is necessary to work the machine or to stall out the converter. To stall out the machine apply the brakes and engage the transmission control levers in the forward and high gear positions. Accelerate the engine to ½ to ¾ throttle. Hold the engine at stall until the desired outlet temperature is reached.

5. Once the correct transmission oil temperature has been reached park the machine on flat, level ground and leave it running. 6. Place the transmission in neutral and apply the park brake. 7. The minimum converter outlet pressure is 172.4 kPa (25 psi) when the engine speed is 2000 RPM. 8. The maximum converter outlet pressure is 482.6 kPa (70 psi) when the engine is at no load governed speed (2250 RPM). 9. Shutdown the machine, allow sufficient time for the transmission to cool, remove the pressure gauge and replace the test port plug.

Excessive transmission stall will overheat and damage the torque converter.

Clutch Pressure

The clutch pressure is measured from the clutch pressure port on the top of the transmission. The normal clutch pressure operating range is 1680 kPa to 1930 kPa (240 psi to 280 psi).

To check the transmission clutch pressure:

1. Release the park brake as the transmission is fitted with a park brake actuated declutch valve in the forward and reverse directions and pressures will not be a true reading. 2. Allow the transmission oil to warm up to 82.2 °C to 93.3 °C (180 °F to 200 °F). See page 176. 3. With the brake applied and the engine at idle speed (650 RPM) shift through the directional and gear clutches taking note of the pressures indicated at each shift. 4. All clutch pressures must be within 35 kPa (5 psi) of each other. If pressure varies outside the 35 kPa tolerance then clutch repair is required.

Transmission Assembly